Hey! I had sex for about 10 days ago. 6 days later I noticed a bump that looked kinda like a pimple at first (but now after four days it doesn´t) on the upper half of my penis. It doesn´t hurt at all only a little discomfort when I try to burst it. When I try to burst it nothing happens. It is no puss inside. I went to the doctor and he said that this couldn´t be herpes cause herpes would appear as many blisters and be painful. But since it 6 days is the approximate time for herpes blister to appear im very worried. The doctor didn´t find out what this could be. What do you think?